Carbureting apparatus.



A. GRANDJBAN.

GARBURETING APPARATUS. APPLICATION FILED JUNE 28, 1907.

4 SHEETS-SHEET 1.

Patented Mar. 2.9

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A. GRANDJEAN.

CARBURETING APPARATUS.

APPLIUATION FILED JUNE 28,1907.

Patented Mar; 29, 1910.A

4 SHEETS-SHEET 2.

(il/c y' Ms Wijf/72W: 574mg@ A. GRANDJEAN. ARBURETING APPARATUS.APPLIGATION FILED JUNE 2a, 1907.

'Patented Mar.29,1910.

4 SHEETS- SHEET 3.

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ANDREW E, GRAHAM Cm PNnTo-mHoGRAPMnm. wAsmNawN. DJ;

A. GRANDJEAN. GARBURETING `APPARATUS. APPLICATION FILED JUNE 2s, 1907.

953,606. Patented Mar. 29,1910.

4 SHEETS-SHEBT 4.

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ANUREW B. GRAHAM 00,. PKOTUMTHQGRAPHERS. WASHINGTON, D. c4

" UNITED STATESPATENT OFFICE.

ARTHUR GrlltANDJEAN',i011|"` SAN DIEGO, CALIFORNIA.`

Specification of Letters Patent.

CARBURETING APPARATUS.

Patented Mar. 29, 1910.

Application filed June 28, 1907'. Serial No. 381,2(59.v

To all whom it may concern:

` `Be it known that I, ARTHUR GRANDJEAN, a citizen of the United States,residing at San Diego, in the county of San Diego and State ofCalifornia, have invented new and useful Improvements in Carbureting Appay ratus, of which the following is a specifica.-`

tion.`

This invention is an improved carbureting t apparatus for carburetingair consisting of a mixture ofatmospheric air and vapor of liquidhydro-carbon under pressure sufficient to cause such carbureted air toflow from the apparatus through the service pipe to the lights or point`of consumption, one object of the present invention being to combinewith a generator an air compressor to supply air and control the supplyof liquid hydro-carbonthereto, a gasometer connected 20v to thegenerator' and having a pressure-actuated element, and means, includinga cony trolling element actuated by the pressure actuated element of thegasometer to control the operation of the air compressor.

A further object is to combine in apparapressor to supply air theretoand a liquid hydro-carbon supply means for the generator controlledautomatically by the air compressor so that the Y carbureted `air ismaintained at constant pressure in the service pipe.

A further object is -to provide improvedv means for supplying air underpressure and liquid hydro-carbon to the generator.

Ar further object is to provide, iii connec-l tion with the means forsupplying under pressure a liquid hydro-carbon to the gen-f erator,means to prevent liquid hydro-carbon from being .forced by'`backpressure from the generator to the air compressor.

llVith the above and other objects in view, the invention consists inthe construction, combination and arrangement of devices hereinafterdescribed and claimed.

` fn the accompanying drawing :`-Figure l 1 is a vertical sectional viewof carbureting apparatus embodying my invention on a plane intersectingthe air pump or compressor and the gasometer. Fig. 2 is a detailedsectional view ofthe same on a plane intersecting thacasing of thegenerator. `Fig.` 3 is a detailedsectional view of the valve whichcontrols the supply of the liquid hydro-carbon to the generator. Fig. 4

is a similar view of the valve which controlsv `ling means.

the passage of the gas or oarbureted air from the generator to thegasometer. Fig. 5 is an elevational view of the upper portion of theguide frame for the gasometer bell and the means cari'ied thereby foioperating the lever controlling the supply of motive fluid to thecompressor. Fig. 6 is a perspective view of the rose. Fig. 7 is a viewin elevation, partly in section, illustrating the valves, levers andoperating means for the motive fluid. Fig. S is a section on line 8-8 ofFig. 7. Fig. 9 is a view in elevation, partly in section, of the meanscontrolled by the gasometer for controlling the supply of motive fluidto the compressor. Fig. 10 is a section on line 10--10 of Fig. 9. Fig.1l is a side elevation of the air compressor, showing the motive fluidsupplying and control- Fig. l2 is an enlarged section on the line 12-12of Fig. 5.

I first describe a generator or carburete-r foruse in my improvedcarbureting apparatus.

A casing l is here shown as of cylindrical form having a fiat bottom 2provided with a central opening, and having a conical upper portion a.To the under side of the bottom of the casing is secured an invertedconical receptacle 5, which communicates with the interior of the casingthrough the opening 3 and serves to collect the sediment which settlesfrom the liquid hydrocarbon in the casing. A drain pipe 6 leads fromsuch receptacle and is provided with a valve 7, whereby it may be openedor closed at will. At one side of the casing is a gage 8 which may be ofany suitable form and 'which serves to enable the level of the liquidhydro-carbon in the bottom of the casing to be noted. Spaced, a slightdistance above the bottom of the casing, is an inverted funnel-shapedrose or sprinkler 9 which is here shown as a hollow conical vesselhaving a perforated bottom 9a and supported by brackets 10. Theperforated bottom of this rose is submerged .in the layer of liquidhydrocarbon at the bot-tom of the generator casing and air is dischargedthrough the perforations therein in the form of minute jets, whichpassthrough and become impregnated with particles of hydrocarbon. A duct,which is here shown as a pipe 11 enters the casing at a point near theupper end thereof and extends downwardly through such casing andcommunicates with the rose 9;

Above the generator or carbureter is a tank or reservoir 12 to containliquid hydrocarbon to be ted therefrom to the generator. A tube 13vconnects the upper end of the generator casing with the upper end of thetank 12 and is provided with a valve 14, which, when open, serves toequalize the pressure in the generator and in the supply tank 12. Thepipe 11 has a horizontal arm 11a which is provided with an upwardlyextending arm 15 at the upper end of which is the casing 16 of a valveto control the supply of liquid hydro-carbon from the tank to thegenerator. A supply pipe 17 which extends transversely below the tank 12has one end connected thereto, as at 18, such connection including avalve 19, and the other end connected to the valve casing 16. On thesaid pipe is a standard 20 to which is pivoted the inner end of a leverarm 21 on which a weight 22 is slidably mounted. Said lever is pivotallyconnected as at 23 to the upper end of the valve stem or rod 24 of thevalve 25 which operates in the casing 16 and which serves to permit orcut ott the flow of liquid hydro-carbon from the tank to the generator.Such valve is normally closed by the action of the lever arm 21 and itsweight 22. The tank 12 is here shown provided on one side with a gage 26to indicate the condition of the liquid hydro-carbon in such tank. Thetank is here shown as supported by a standard 27 which rises from theT-coupling 28 that serves to connect the carbureted air delivery pipe 29to the upper end of the generator. Said pipe 29 extends downwardly andterminates in a vertical arm 30, which is located in the tank element 31of a gasometer 32, which comprises, in addition to such tank element, apressure actuated element, which is here shown as a bell 33. Water isplaced in the tank element and serves to effect the seal between thesame and the bell. The arm 30 of the carbureted air delivery pipe 29extends upwardly a slight distance above the level of the water in thegasometer tank and is provided with a casing 34 having a valve 35 whichcloses upwardly against the valve seat and has an operating rod 36 theupper end of which is pivotally connected as at 37 to a lever 38, saidlever being pivotally connected at one end as at 39 with a lug 40 whichextends upwardly from one side of said valve casing. A service pipe 41leads from the gasometer tank, its inner end being formed by alfunnel-shaped arm 42, which extends upwardly in said gasometer tank andthe upper end of which is above the level of the water in such tank.

In connection with the generator, I employ suitable means Jfor feedingair under pressure thereto for carbureting therein.` Such aircompressing and feeding meansV is here shown as an air pump 43, which ison vertically disposed equidistantly spaced guide rods 47, which areconnected by braces 47a united by a coupling 47 b, which latter alsoacts as a stop to limit the upward movement of the bell to which isiixed a horizontally extending stop arm 147 which limits the up- 80 wardmovement of the bell 45. An air inlet pipe 48, which is open at itslower and upper ends, extends upwardly in the tank 44 of the air pumpand is provided at its upper end with a valve 49, hinged, as at 50, andg5 provided with an operating arm 51 which extends from the hinged sidethereof and has at its outer end a weight 52 which counterbalances saidvalve and enables the same to be readily operated. An air pipe 53 leads9o from the air pump to the pipe 11. The inner end of such pipe 53 isformed by an arm 54 which extends upwardly through the water in the tank44 and is funnel-i.

shaped. The connection between the pipe 53 and the pipe 11 forms anelevated portion or goose-neck 54a, which serves to prevent the flow otlliquid hydro-carbon from the tank 12 through the pipe 17 and arm 15 ofthe pipe 11 to the air pump and said elevated'connec- 100 tion or thegoose-neck includes a check valve, indicated at 55, which closes againstthe back-pressure from the generator casing to the air pump.

It will be noted by reference to the drawings, that the arm 15 whichforms a part of the conduit leading from the tank 12 to the pipe 11 isbetween the check valve 55 and the generator. It will also be noted thatthe pipe 11 which leads to the generator 110 forms a common conduit bothfor the liquid hydro-carbon and the air under pressure supplied to thegenerator.

The bell or movable element of the air pump or air compressor isoperated by fluid pressure mechanism including a cylinder 56. In thetank V44 and piston'or plunger 57 in such cylinder is a rod 58 whichconnects such piston or plunger to the upper end of the bell element 45.A weight 59 is on such ele- 12o ment to normally depress the same and toforce the same downwardly when the pressure of the air undervsuch bellelement diminishes. A similar weight 60 operates in a similar manner onthe bell 33 of the gas- 1'25 oineter. A water supply pipe 61communicates with the lower end of the cylinder 56. In practice suitablemeans are employed to admit water under pressure through such pipe 61 tosuch cylinder to cause the bell 45 130 Such air 70 Mix.,

to be forced upwardly and to permit the scribed and `shown in myco-pendino` application for Letters Patent hereinbe ore referred to andhereinafter described. Such motive fluid supply means is in accordancewith my present invention connected to a 'controlling element, hereshown as a lever G2 fulcrumed as at G3 on the extended upper end 17C `ofone iof the guide rods 47. The

' tank `3ljof the gasometer carries guide iods `3lEL for the bell 33,which rods are coupled by cross rods 31h and 31, and slidably mounted inguides 311 on said cross rods is `an operating rod Get provided with apinA 64a engaging la slot 64b in the end of the long arm 62a Iof lever62, whereby said lever is slidably and pivotally connected with said`operating rod. As shown, the rod 64 is limited in its downward movementby a cushioning spr-ing 64e@ and is adapted to drop by gravity fronii anelevated position to its lowered position shown in Figs. 2 and 5.

`Ati'ts lower end the operating rod carries a head or contact piece 64darranged to be engaged by the weight on the upward movement of thelgasometei` bell, which weight is preferably cutout to provide areceiving recess 69il for said head whereby to guide the operatingrod inits vertical movement and prevent undue lateral strain. A rod extendsdownwardly from the upper end of the gasoineter bell 33, passes throughand is slidablerin an "opening near the free end of the lever 38 of thevalve 35 and is provided at a suitable distance from its lower end witha stop ortappet- 6G which serves when the gasometei'fbell has beenraised by the pressure of the carbureted air to the desired maximumextent, to engage and lift such lever 38 and cause the same to closethevalve the water thereunder, a contact (58 on such tappet rod 68 engagesthe lever arm 2l of the valve 25 and lifts such valve so as to cause theliquid hydro-carbon to be fed from the tank 12 to the pipe 1l.

`To `enable such moisture as may accumulate iii the pipe to bedischarged therefrom from time to time, I provide such pipe at its lowerend with a drain pipe 70, as

shown in Fig. 2, which drain pipe has a valve 7.1.

The motive i'iuid supply and exhaust pipe 6l leading from the cylinder56 is connected exteriorly of the tank with a. cross coupling 72, thebranches 73 and 74 of which communicate with' valve casings 75 and 76respectively located on opposite sides of the pip-e (il. The casing 73communicates with a pipe 77 which in turn is in open communication withany supply pipe carrying water under pressure, as a city service main 78or the like; while the casing 7a is in communication with a waste or`discharge pipe 79.

Each of the casings and 76 contains a valve 80, the stems S1 and 82 ofwhich valves project vertically above the casing. The

coupling 72 is provided with a vertically projecting post 83 bifurcatedat its upper end and revolubly supporting transverse the bifurcation apivot pin Sel. Levers S5 `and 86 are pivotallyi supported at their innerends on said .pin 84, extend in oppositie directions frcm the post 83and are respectively connected to the valve stems 8l yand 82, the freeend of each of the levers being provided with an adjustable weight 87.Standards 88 are arranged adjacent the respective levers and support orare extended to provide an inverted U-shaped guide frame 89, preferablyformed fof spaced strips terminally connected to the standards, and soarranged as to .permit the passage therebetween Aof the levers 35 and86. A balance arm 90 is also pivotally secured upon the pin 84,projecting upwardly therefrom and guided between the strips of the frame89, the upper end of the arm `being weighted at 91. Pins 92 and 93 are'revolubly mounted transversely of the strips forming the frame 89directly beneath the levers `85 and S6 respectively, which pins carrycams 94 and 95 arranged to contact with and elevate the are fixed to thepins 92 and 93 and extend 100 projecting. laterally therefrom and ar-Vranged oii opposite sides of the balance arm, whereby said arni inmovement williinpart a reciprocating' movement tothe bar 98 and therebyrock the arms 96 and 97 and Vthe pins 92 and 93 and operate their cams.The cams 94 and 95 are arranged so that when one is in operativeposition the `other will be in inoperative position, as shown in Fig. 7.A bar 101 is connected at its lower end `to an arm 102 rigidly securedto and `projecting at right angles from the balance arm 90, the upperend `of said bar being longitudinally slotted, as at 103. The bar 101 isdisposed adjacent to the tank lll and is engaged by a trip 104i securedto thevtop of the through the slot 103 so as to play between the stopsformed by the upper and lower end walls of said slot.

The motive service pipe 78 is, adjacent its connection with the pipe 77,provided with a valve 105, the stem of which is connected to a lever 106fulcrumed upon a standard 107 projecting from the floor or base of theapparatus. Beyond the valve 105 relative to the standard 107 is arrangeda second standard 108 bifurcated at its upper end to receive and guidethe free end of said lever. Journaled in the walls of the bifurcation ofthe standard 108 is a transverse pivot pin 109 carrying a cam 110designed to elevate the lever 106. An arm 111 is fixed upon the pin 109beyond the standard, its free end being connected with the short arm 62bof the lever 62 by a connection 112. The parts are so positioned thatwhen the cam 110 is .in inoperative position a weight 113 on the freeend of the lever 106 operates to close the valve 105 and thereby shutoff the motive fluid supply to the apparatus, while, on a reversemovement of the cam, the free end of the lever 106 is elevated, openingthe valve 105 and restoring communication between the main and supplypipe 61.

It has been found desirable to secure a quick action of the valve 105,and for this reason means must be provided for securing an open movementof the lever 106 at greater speed than incident tothe slow descent ofthe gasometer bell. The construction with this object in view isillustrated particularly in Figs. 5 and 12, wherein it will be notedthat the rod 64 is hollow and at that point registering with the guideor coupling 31b when the bell is fully elevated is formed with anopening 114. The cross bar 31b joining the guide rods 31a is hollow andadapted to slidably support a rod. 115, the outer end of which projectsbeyond the rod 311 and is provided with a stop 116, limiting itsmovement toward the rod 64. The inner end of said rod 115 is adapted toengage the opening 114 in the rod 64 when the parts are in registeringposition and prevent descent of said rod 64, the engagement beingautomatically maintained through the medium of a coiled spring 117encircling the pipe 31b and bearing against a pin 118 projecting fromthe rod 115 and through an elongated slot 119 in the pipe 31h, asclearly shown in Fig. 12. An angle lever 120 is pivotally supported onthe guide 31h, the short arm of said lever being connected by a rod 121with the pin 118, while the long arm of the lever is provided withl aheaded pin 122 engaging an elongated slot 123 in a bar 124 whichprojects toward the gasometer bell and carries at its lower end a weight125.

In o eration, assuming the parts constructe and arranged as describedand the hydraulic controlling mechanism in the position illustrated inFig. 11, in which it ywill be noted that the valve in the casing 75hereinafter termed the inlet valve, is open and the valve in the casing7 6, hereinafter termed the outlet valve, closed, the motive fluid fromthe main 78 is freely admitted through the pipes 77, 73 and 61 to thecylinder 56, the pressure of the water on the piston 57 serving toelevate the bell 45. This movement of the bell tends to create a partialvacuum above the surface of the sealing liquid in the pump, wherebyairis caused to rush in through the supply pipe 48. The upward movementof the bell and consequently the indrawing of air is continued until thetrip 104 engages the upper end wall of the slot 103 in the arm 101. Aslightly further movement of the bell after this contact operates tomove the balance arm 90 to the reverse position from that shown in Fig.11, which arm in its movement contacts with the pin 99 projecting fromthe arm 98 and moves said arm 98 with the effect to reverse the normalor operative positions of the cams 94 and 95, moving the former to aninoperative position and the latter to an operative position, as shownin Fig. 7. The weight on the free end of the lever 85 willconsequentlyat once operate to close the inlet valve, while at the same time theelevation of the lever 86 effects the opening of the outlet valve. Theflow of the motive fluid to the cylinder is thereby arrested and theupward movement of the bell 45 stopped, the fluid within the cylinderexhausting into the escape pipe 79 through the pipes 61 and 74 and valve76, leaving the bell free for downward movement so far as the pressureof the motive fluid is concerned. The weight 59 now operates to depressthe bell and thereby force the contained air through the pipe 53 intothe generator, the air passing through the body of hydrocarbon in thegenerator, whereby it is saturated and enriched to form the carburetedair. When the bell 45 has moved downward a suiiicient distance to causethe trip 104 to contact with the lower Wall of the slot 103, a reversemovement of the parts of the valve mechanism is effected, the outletvalve being closed and the ,inlet valve opened, whereby the bell isagain elevated and the pump recharged with air, the check valve 55 inthe pipe 53 preventing any return flow of the air delivered to thegenerator through said pipe. On the upward movement of the bell 45 asdescribed and just prior to the reversal of the valve mechanism as setforth, the contact 68a engages and elevates the lever arm 21, therebyopening the valve 16 for the feed of a charge of hydrocarbon from thereservoir 12 to the rose within the generator through the pipes 17, 15and 11, the hydrocarbon feeding action in practice being such as tomaintain a shallow layer. or level Vof the hydrocarbon within the.bottom ofthe generator tank to a i point abore the `perforated bottom ofthe weight 22, thus closing the feed valve 16 after the bell hasprogressed slightly on its downward movement. On such downward movementof the bell the air contained within the pump above the sealing liquidis forced out through the pipe 53 and check valve in the goose neck 54ainto the pipe 11, the current of air discharging through the rose andthe body of hydrocarbon in the generator where? by it is enriched, suchaction securing a saturation of the air to the desired extent with thehydrocarbon in an effective manner. This operation is repeated upon eachascent and descent of the pump bell, making the feed of hydrocarbon andair to the generator automatic in every respect to supply a continuousamount of carbureted air to the gasf ometer until the latter is fullycharged. The feed of carbureted air from the generator to the gasometercontinues until the bell 33 thereof is elevated to a maximum extent,when the bell ycontacts with and elevates the rod 64, thereby raisingthe long arm 62a and lowering the short arm 62b of the lever 62,allowing the arm 111 through the relaxation of the. connection 1,12 todrop and retract the cam 110, whereupon the weight 113 acts upon thelever 106 to close the valve 105,

shutting olf the flow of motive fluid from the main to the pumpindependent of the pump valve mechanism hereinbefore described. The feedof gasolene and air to the,

generator will thus be automatically cut ofl' until the pressure in thebell 33 decreases and said bell falls and allows the rod 64 to return bygravity and the action of the spring 64C` to normal position, whereuponthe lever 62 and the valve 105 will be reset for `further action toagain restore communication between the main and the pipe 61. In

` the downward movement of the bell of the gasometer, whensaid bell hasdescended to a prescribed extent, the weight 12,5 which has beenpreviously elevated to operate the lever 120 and lock the rod 64 againstmove*V ment by the rod 115, is released, thus allowing said rod 64 todrop quickly and suddenly into contact with the gasometer bell, whichmovement causes a quick action of the valve 105 for admitting an initialflow of motive fluid of sufficient power to properly control thesubsequent operation vof the apparatus.

By the construction and mode of operation of the parts described, bywhich the supply of the motive fluid is controlled by both the bell ofthe pump and the bell of the gasometer, and by which the feed ofgasolene or other hydrocarbon to the generator is controlled by the bellof the pump, a regular supply of hydrocarbon to the generator and oftheresulting gas to the gasometer is automatically secured in a simple andeffective manner to supply sufficient gas for consumption and no more.As a result, an apparatus is provided which is self governing and isadapted for private or isolated plants, as

it requires no manual control beyond the initial adjustment of the partsand the necessary renewal of the hydrocarbon within the reservoir asoccasion requires.

Having thus described my invention, what I claim, is :n

1. In a carbureter, the combination with a hydrocarbon reservoir, agenerator, and a gasometer in communication with the generator andhaving a movable bell, of a feed pipe leading from the reservoir to thegenerator and provided with a controlling valve, g5 an air pump having adelivery pipe leading to the generator and provided with a. movable belladapted to descend by gravity and to be elevated by fluid pressure, saidbell carrying a contact device adapted in its upward movement to opensaid valve, means for supplying a motive fluid under pressure forelevating the bell, and means operated by the respective bells throught-.he pressures in the gasometer and pump for independently controllingthe motive fluid supply.

2. In a carbureter, the combination of generator, a gasometer incommunication therewith and having a movable bell, a hydrocarbon supplytank, an air compressor in communication with the generator, saidcompressor also having a movable bell adapted to descend by gravity anddischarge air therefrom to the generator, means actuated by the movablebell of the compressor for feeding charges of hydrocarbon from thesupply tank to the generator, means for supplying a motive `fluid forelevating said compressor bell, and means operated by the bell of thegasometer for controlling the supply of the motive fluid.

3. In a carbureter, the combination of a hydrocarbon reservoir, agenerator, a gasometer in communication with the generator and having amovable bell, a hydrocarbon feed pipe leading from the reservoir to thegenerator, an automatically closing valve in said pipe, an air pumphaving a movable bell adaptedY to descend by gravity and to be elevatedby fluid pressure, an air feed pipe leading from the pump and leading tothe generator, a contact device on the bell of the pump adapted on itsupward movement to open said valve, means for supplying a mos tive fluidunder pressure for elevating the pump bell, valve mechanism controllingthe inlet and exhaust of the motiveflluid, and means controlled by thebell of the gasometer for operating said valve mechanism to let on oroff the supply of motive fluid to the pump.

4. In a carbureter, the combination of a generator, a gasometer incommunication therewith, a hydrocarbon reservoir arranged above thegenerator, a hydrocarbon feed pipe leading therefrom, said pipe havingan automatically closing controlling valve therein, a combined air andhydrocarbon feed duct leading into the generator and connected with thefeed pipe, a fluid pressure operated pump for supplying air to thegenerator, said pump having a movable member provided with means to opensaid valve, means actuated by the bell of the gasometer for controllingthe supply of motive fluid, to the pump, an air feed pipe leading fromthe pump to said duct and connected therewith at an angle to the oilfeed pipe, and a check valve in said air feed pipe adjacent its point ofconnection with said duct.

5. In a carbureter, the combination with a hydrocarbon reservoir, agenerator, a gasometer in communication with the generator and having amovable bell, of a hydrocarbon feed pipe leading from the reservoir tothe generator, a valve in said pipe, a weighted arm for automaticallyclosing the valve, an air pump having a movable bell adapted to descendby gravity and to be elevated by fluid pressure, an air feed pipeleading from the pump and connected with the hydrocarbon feed pipeleading to the generator, said air feed pipe being provided adjacent tosaid hydrocarbon feed pipe with a goose neck having a check valvetherein, a contact device on the bell of the pump adapted on its upwardmovement to engage and operate said weighted arm to open the valve,means for supplying a motive fluid under pressure for elevating the pumpbell, valve mechanism controlling the inlet and exhaust of the motivefluid, and means controlled by the pressure in the gasometer and pumpfor operating said valve mechanism to let on or cut olf the supply ofmotive fluid to the pump.

6. In a carbureting apparatus, the combination of a generator, agasometer in communication therewith, a hydrocarbon supply tank arrangedabove the generator, a hydrocarbon feed pipe leading therefrom, saidpipe having a controlling valve therein, a lever arm adapted to beactuated to open the valve and to automatically return the valve toclosed position, a combined air and hydrocarbon feed duct leading intothe generator and connected with the feed pipe, a fluid pressureoperated pump for supplying air to the generator, said pump having amovable member provided with means to engage and operate said lever arm,means controlled by the bell of the gasometer for controlling the supplyof motive fluid to the pump and stopping the movement of said movablemember of the pump when the pressure in said gasometer reaches adetermined degree, an air feed pipe leading from the pump to said ductand connected therewith at an angle to the hydrocarbon feed pipe, and acheck valve in said air feed pipe adjacent its point of connection withsaid duct.

7. In a carbureting apparatus, the combination of a generator, agasometer in communication therewith, a hydrocarbon supply tank arrangedabove the generator, a hydrocarbon feed pipe leading therefrom, saidpipe having a controlling valve therein, a lever arm adapted to beactuated to open the valve and to automatically return the valve toclosed position, a combined air and hydrocarbon feed duct leading intothe generator and connected with the feed pipe, a fluid pressureoperated pump for supplying air to the generator, said pump having amovable member provided with means to engage and operate said lever arm,means controlled by the bell of the gasometer for controlling thesupplyof motive fluid to the pump and vstopping the movement of saidmovable member of the pump when the pres sure in said gasometer reachesa determined degree, an air feed pipe leading from the pump to said ductand connected therewith at an angle to the hydrocarbon feed pipe, saidpipe being provided with an elevated or goose neck portion adjacent itspoint of connection with the duct, and a check valve in said goose neckportion.

8. In a carbureting apparatus, the combination of a generator, agasometer, a hydrocarbon feed tank arranged above the generator, adelivery pipe leading from the generator to the gasometer, a support forthe tank, a T-coupling communicating with the generator and connectingsaid delivery pipe and support therewith, a hydrocarbon feed pipeleading from the tank to the generator, a pressure equalizing pipeconnecting the generator with the tank, a feed valve in said feed pipe,an air compressor having a movable element adapted to open said valve, acheck valved air supply pipe leading from the compressor to thegenerator, means for supplying a motive fluid to operate thecompressor,and means operated by the bell of the gasometer to controlthe supply of motive fluid to the compressor and t0 regulate the actionof the said movable element thereof.

In testimony whereof, I aflix my signature in presence of two witnesses.

ARTHUR GRANDJEAN.

lVitnesses:

C. K. HUDSON, W. D. FRENCH.

